Recovery of acrylonitrile from charcoal tubes at low levels.
Am Ind Hyg Assoc J 1979 Oct; 40(10):923-925
A simple modification to NIOSH method S156 for testing the presence of acrylonitrile (107131) was developed to allow sampling and analysis of the compound at low concentrations. The accuracy and precision of recovery of known quantities of acrylonitrile from activated charcoal (6902947) when applied from vapor and liquid phases were studied, along with the stability of adsorbed acrylonitrile in the absence of inhibitor and in the presence of moisture. A two percent by volume acetone (67641) in carbon disulfide (75150) was used as a solvent to test for lower concentrations of acrylonitrile. The amounts collected corresponded to the weight of acrylonitrile present in a 15 liter sample at 0.5 and 0.25 parts per million parts of air, respectively. Samples were stable for at least a week of storage, even in the absence of a stabilizer. It is concluded that the modified process provided adequate precision and accuracy for analysis at a level of about 16 micrograms per sample, which is below the level required by the new standard.
NIOSH-Author; Air-quality-methodology; Air-quality-measurement; Trace-analysis; Gas-vapors; Toxic-substances; Analytical-methods
107-13-1; 6902-94-7; 67-64-1; 75-15-0
American Industrial Hygiene Association Journal